I think we are on the same page, but I still believe that you are overlooking a huge chunk of the cost (and complexity). Let me explain:
The majority of the “cost” of the modern Axis & Allies games (or any board game, for that matter) is transportation cost of the size and weight of the box, with the actual components (paper/plastic/cardboard) as the secondary driver. These games are made and boxed in China, then packed in containers for oceanic shipping. Those are priced by the cubic foot, of course. Once they arrive stateside, they are loaded into trucks or trains (price per pallet), taken to distribution centers, and from there shipped in smaller mixed loads to stores, or mailed via a common carrier (all based on size/weight.
I think it is critical to divorce the boards, which make up a huge chunk of “cost” when taking this into account, from the game. We already have Axis & Allies 1941 as an example, assuming that Hasbro/Renegade is making some profit then about $25 is a fair expectation for 200 pieces + board/rules/box.
Your pricing, for a G40 player, would be as follows:
Axis & Allies Base - $30 (a bit more expensive than 41 as it would have a few more pieces - injection molded plastic isn’t wildly expensive however).
Axis & Allies Advanced - $30 (I can’t drop the price any cheaper than 1941, as the components are quite similar - map + some pieces, but the board is bigger)
Axis & Allies Global - around $60 (the pieces are minimal, but the combined weight of the boards drives much of this price)
Here is the problem - your hypothetical G40 player HAS to spend $30 extra for Italy + some minor pieces, and ends up with a map that they don’t really need or use. Here’s my solution:
Axis & Allies Base - $30 (as above)
Axis & Allies Advanced - $25 (pieces ONLY - nothing else. Small box, about half the size of the 1941 box, with about 600 - 700 pieces). Smaller size = less cost.
Axis & Allies Games - as most of these are map and rules only, they can actually be a bit thinner than the current boxes , but still sufficient to stand on a shelf. Each one of these assumes you own #1, and some will have to explicitly state if you need to own #2. Of course, if any new pieces are introduced they will be included here.
This also neatly avoids the issues of a game that requires Italy + other advanced pieces requiring a customer to purchase 4 games, under your system. For example, Axis & Allies North Africa. A buyer in your system would need the base game, plus advanced for Italy, plus G40 for all of the mechanized infantry, French pieces etc, PLUS the actual North Africa game. That sounds like game DLC hell.
Meanwhile, my system would just required base + advanced plus the actual game. No need to have an AA50 board and a G40 board taking up space in your house because you don’t need it!